could sign
Verbo regolare: sign - signed- signed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could sign
you could sign
she could sign
we could sign
you could sign
they could sign 	I could be signing
you could be signing
she could be signing
we could be signing
you could be signing
they could be signing	I could have signed
you could have signed
she could have signed
we could have signed
you could have signed
they could have signed	I could have been signing
you could have been signing
she could have been signing
we could have been signing
you could have been signing
they could have been signing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't sign
you couldn't sign
she couldn't sign
we couldn't sign
you couldn't sign
they couldn't sign 	I couldn't be signing
you couldn't be signing
she couldn't be signing
we couldn't be signing
you couldn't be signing
they couldn't be signing	I couldn't have signed
you couldn't have signed
she couldn't have signed
we couldn't have signed
you couldn't have signed
they couldn't have signed	I couldn't have been signing
you couldn't have been signing
she couldn't have been signing
we couldn't have been signing
you couldn't have been signing
they couldn't have been signing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I sign?
could you sign?
could she sign?
could we sign?
could you sign?
could they sign? 	could I be signing?
could you be signing?
could she be signing?
could we be signing?
could you be signing?
could they be signing? 	could I have signed?
could you have signed?
could she have signed?
could we have signed?
could you have signed?
could they have signed? 	could I have been signing?
could you have been signing?
could she have been signing?
could we have been signing?
could you have been signing?
could they have been signing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I sign?
couldn't you sign?
couldn't she sign?
couldn't we sign?
couldn't you sign?
couldn't they sign? 	couldn't I be signing?
couldn't you be signing?
couldn't she be signing?
couldn't we be signing?
couldn't you be signing?
couldn't they be signing? 	couldn't I have signed?
couldn't you have signed?
couldn't she have signed?
couldn't we have signed?
couldn't you have signed?
couldn't they have signed? 	couldn't I have been signing?
couldn't you have been signing?
couldn't she have been signing?
couldn't we have been signing?
couldn't you have been signing?
couldn't they have been signing?